19 February 2009 Synthesis and luminous characteristics of Ba3CaSi2-xAlxO8:Eu, Mn phosphor for white LED
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Ba3CaSi1.7Al0.3O8: Eu, Mn white-emitting phosphor was prepared by solid reaction and X-ray powder diffraction (XRD) analysis confirmed the formation of Ba3CaSi1.7Al0.3O8: 0.1Eu, 0.1Mn. It was found experimentally that, its three-color emission peaks situated at 621, 491 and 435 nm respectively under excitation of 350-450nm irradiation. The 435nm and 491nm emission bands are attributed to 4f to 5d transition of Eu2+ ions. The emission band peaking at 621nm originates from the 4T1-6A1 transition of Mn2+ ions after the energy transferring from Eu2+ to Mn2+ ions. When the concentrations of the Al3+, Eu2+ and Mn2+ ions were 0.8 mol, 0.1mol and 0.1mol respectively, the sample presented intense white emitting. The addition of Al ion to the host leads to a substantial change of intensity ratio between blue to green emission.
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Changyu Shen, Changyu Shen, Yi Yang, Yi Yang, Shangzhong Jin, Shangzhong Jin, Jiangzhou Ming, Jiangzhou Ming, } "Synthesis and luminous characteristics of Ba3CaSi2-xAlxO8:Eu, Mn phosphor for white LED", Proc. SPIE 7279, Photonics and Optoelectronics Meetings (POEM) 2008: Optoelectronic Devices and Integration, 727905 (19 February 2009); doi: 10.1117/12.819442; https://doi.org/10.1117/12.819442


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